Edson l



(No Model.)

B. L. BRYANT, ARGAND LAMP.

Patented Mar. 16, 1886.

N. PETERS, Phulo-Ullvognpllr. Walh'mghn. D C.

I 5 ed to be applied to a pottery or other stand- UNiTED STATES PATENTOFFICE.

EDSON L. BRYANT, OF ANSONIA, CONNECTICUT, ASSIGNOR OF ONE-HALF TOVALLACE & SONS, OF SAME PLACE.

ARGAND SPECIFICATION forming part of Letters Patent No. 338,137 datedMarch 16, 1886.

Application filed May 18, 1885. Serial No. 165,796. (No model.)

To all whom it Wmy concern.-

Be it known that I, EDSON L. BRYANT, of Ansonia, in the county of NewHaven and State of Connecticut, have invented a new Im- 5 provement inArgand Lamps; and I do hereby declare the following, when taken inconnection with accompanying drawing and the letters of reference markedthereon, to be a full, clear, and exact description of the same,

and which said drawing constitutes part of this specification, andrepresents a side view, half in vertical section.

This invention relates to an improvement in that class of lamps in whicha round or tubular wick is employed, and air admitted in side the wickto aidin combustion, commonly called Argand Burners, and particularly tothat class in which a central tube extends up through the fount andburner to deliver air to the flame above the wick. In some cases in thisclass of lamps a disk, commonly called a button, is arranged over themouth of the tube within the wick, to deflect the air from the tube tothe flame. In other cases an auxiliary tube is introduced into the topof the tube, of somewhat less diameter than the tube, and extendingabove the top of the wick or base of the flame, the extended portionbeing perforated, so as to distribute the air upon the 0 flame at aconsiderable distance above its base. Such auxiliary tube complicatesthe construction of the lamp and burner, and because of its removabilityis liable to displacement. For perfect work, it is necessary that theextended portion should always stand in a perfectly-concentricpositiontotheflame. Again, the auxiliary tube adds considerably to the cost ofthe lamp.

' The object of-my invention is to overcome 0 these difficulties; anditconsists in making the perforated extension of the central air-passagean integral part of the central tube itself, and as more fullyhereinafter described.

A represents thelamp-fount, which is adaptard, and through which air maybe admitted to the bottom of the fount. In this case the fount isdesigned to be supported by an annular flange, a. The construction ofthe fount, however, constitutes no part of my invention.

Through the fount is a central vertical tube, B,

open at the bottom, and extending up through the top of the fount to aconsiderable distance above the base of the wick. Above the fount, andsurrounding this central tube, B, is an 5 outer tube, C, which forms anannular space around the inner tube, and into which the tubular wick Dis introduced in the usual manner, the wick being adjusted by a ratchet,E, or otherwise. Surrounding the outer tube is the chimney, gallery, orrest F, which may be of any of the usual constructions.

The upper end of the tube C forms the base of the flame, the wickprojecting above the end of the tube to a sufficient extent for theflame, it being understood that the wick surrounds the inner tube, B,and extends down into the fount, so as to take up oil therefrom.

The tube 13, as before stated, is of suflicient length to extend abovethe upper end of the surrounding tube C, G indicating such extension.

The portion G of the tube which extends above the outer tube, C, isfinely perforated, as shown. The perforations may extend below the baseof the wick.

The upper end of the tube B is closed by a disk, cap, or plate, H, andso that air passing up through the tube 13 will pass radially outwardfrom the tube directly into the body of the flame, which surrounds theextension of the tube. Preferably the top or closed end of the tube isprovided with an annular flange, 1), projecting radially outward, thetendency of which is to spread the flame to some extent, and also 95confine the air directly to the body of the flame; but the projectingflange may be omitted, the tube terminating in a closed end. 7

The tube B is made as one continuous tube from bottom to top, includingthe perforated extension; hence, when fixed in the lamp, mu st retainits concentric position with relation to the wick, and cannot be changedtherefrom, and therefore is not liable to the objections due to theaccidental displacement of the aux- 5 iliary tube before referred to.

In some cases the central or inner tube does not extend down through thebody of the lamp, but is open to the atmosphere at some point above,aconstruction of Argand lampburners IO( too well known to requireillustration or particular description in this application.

5 tegral part of the tube, may be applied to any of the various classesof Argand burners.

From the foregoing it will be understood that I do not claim, broadly, alamp having a central passage extending up through the 1o burner abovethe wiclrtube, the upper end of the passage opening through perforationsto the flame; but I am not aware that a lamp has been constructed havingthe outer wick-tube with a central tube forming the inner wall of thewick chamber and concentric with the outer tube, the said inner tubeextended above the outer tube, the extension being an integral part ofthe inner tube, and the extension perforated as described in thisapplication, and

constituting the essential features of the invention; but

What I do claim is 1. A lamp havinga central continuous tube, B,Vertically through it,open at its lower end,

closed at its upper end, a tube surrounding said central tube to form awick-chamber between the two,'the inner tube extending above the outertube, the portion of the inner tube projecting above the outer tuberadially perforated, and the upper end of the projecting portion of thetube constructed With an annular or radially-projecting flange, b, abovethe perforations, substantially as described.

2. In an Argand lamp-burner having the central tube open to theatmosphere at its lower end, a tube surrounding said central tubeconcentric therewith to form a wickchamberbetween the two tubes, theinner tube extended above the outer tube, the extension being in thesame piece and an integral part 40 of the said inner tube, the portionof the inner tube projecting above the outer tube radially perforated,substantially as described.

EDSON L. BRYANT.

Witnesses:

F. L. GAYLORD, W. O. BARCLAY.

